Apache RewriteRule cookie flag

Hello everyone,

I'm trying to use the cookie flag of the RewriteRule directive. I
can't get this cookie to be used by Internet Explorer, it seems to
work fine using Firefox and Safari on a Mac but IE doesn't seem to
recgognize this cookie. Here is the content of the flag:

CO=STICK:YES:.mydomainname.com:60:/

I have tried several other ways of formulating the flag. Has anybody
else had any luck using the cookie flag of the apache RewriteRule
directive? Any help would be greatly appreciated.